I want to write most of my story in first person, but the protagonist is really young at the beginning so I start with 3rd person POV. He is only a child when his family is attacked by the antagonist and his army. He makes it away alive with his father but his mother is killed. They warn the nearest city about the army. There is an epic battle scene when they siege the city. The antagonist vastly outnumbers the defending city and burns it to the ground. The boy and his father barely make it out alive. I then skip ahead when the boy is a teenager, and that is where I start first person POV. I really want to include this part of the story because it sets the framework for when the protagonist is older. I'm not sure though because third person seems a bit more difficult, and I'm not very experienced. Is starting out in 3rd person and then switching to 1st person too much? Should I try to tell this back story some other way? Also, are there any examples of this that I could read up on? Thanks for any help!